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Nacre - Wikipedia, the free encyclopedia
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日期:2026-04-26
Nacre (/ ˈ n eɪ k ər / NAY-kər also known as mother of pearl, is an organic-inorganic composite material produced by some molluscs as an inner shell layer; it is also what makes ... 1 Physical characteristics 1.1 Appearance and structure 1.2 Formation 1.3...看更多














